The upward flow of air is what gives a flame its teardrop shape and causes it to flicker. But odd things happen in space, where gravity loses its grip on solids, liquids and gases. Without gravity ...

1. Ask the adult you are working with to light the candle. 2. Watch the candle flame start out small and get bigger. Notice how some of the wax near the wick melts. 3. As the flame burns, the wax from ...